Brake



April 2, 1935. v. BENDIX ,2

' BRAKE Original Filed Jan. 8, 1927 INVENTOR; VINCENT BEND/X A TTORNEYPatented Apr. 2, 1935 UNITED STATES PATENT OFFICE BRAKE Vincent Bendix,Chicago, 111., assignor to Bendix Brake Company, South Bend, Ind acorporation of Illinois 30 Claims. (Cl. 188-495) This invention relatesto brakes and more particularly to adjusting means for the frictionelements thereof.

The present application is a division of my pending application SerialNo. 159,806, filed January the 8th, 1927, and is made under therequirements of the United States Patent Oflice, under provision of rule42.

Broadly, the invention comprehends means for adjusting the frictionelements of a brake to compensate for wear.

An object of the invention is to provide means connected between thearticulated ends of the friction elements for adjusting the overalllength of the friction elements.

Another object of the invention is to provide an adjusting connectionbetween the articulated ends of the friction elements which provide forcircumferential, radial and pivotal movements of these elements.

A further object of the invention is to provide an adjustable connectionfor friction elements, which is simple in structure, easily and quicklyapplied, and will eificiently perform its intended function.

Other objects of the invention will appear from the followingdescription taken in connection with the drawing, which forms a part ofthis specification, and in which:

Figure 1 is a side elevation of a brake partly broken away and partly insection, illustrating the invention as applied;

Figure 2 is an enlarged detailed view, illustrating the adjustableconnection;

Figure 3 is a section substantially on line 3-3 of Figure 1; and

Figure 4 is a partial section on the line 4-4 of Figure 1.

Referring to the drawing for more specific details of the. invention, Inrepresents a fixed support such as a backing plate having associatedtherewith a rotatable drum I2 which may be secured to a wheel, notshown. Positioned for movement on the backing plate are frictionelements or built-up stamped steel shoes l4 and I6. Each of the shoescomprises a web l8 having integral tongues I9 bent alternately inopposite directions and supporting and welded to a rim 20 to which issuitably secured a liner 22 adaptable. for cooperation with the brakingsurface of the drum. v

The shoes are secured on the backing plate against lateral movement bysuitable steady rests 24 and 26 and are adapted to be spread intoengageme'nt with the braking surface of the drum by any suitable means,such as a cam or other brake applying device, not shown.

The webs of the shoes are longitudinally slotted as indicated at 28 and30, and those portions of the webs defining the slots 28 and 30 areprovided with teeth 32 and 34. Secured preferably by spot-welding on thesides of the webs are reinforcing plates or steel stampings 36 and 38provided with registering semi-cylindrical portions or grooves ordepressions 40 and 42 straddling the slots 28 and 30. The cylindricalportions 40 and 42 provide cylinders or sockets for the reception ofscrews 44 and 46, having respectively right and left threads, andmounted for travel in the cylinders with their threads engaging theteeth 32 and 34, the screws being provided with enlarged heads 48 havingrecesses 50.

The stampings 3B and 38 are free and spaced slightly from opposite sidesof the web of the shoe, along their inner sides at the ends of the shoe,and are held sprung toward each other under fixed tension by means suchas a rivet or other fastening 62, thus frictionally gripping thethreaded shank of screw 44 or 46 between them and preventingunintentional shifting thereof.

As pointed out above, the patches or stampings 36 and 38, which arespot-welded as shown to the opposite sides of the shoe webs, are formedto embrace the stems of the adjusting members 44 and 46. At the sideopposite the spot-welds there are a pair of fastenings 62 serving tohold the stampings 3B and 38 clamped, under fixed tension, against theopposite sides of the adjusting members 44 and 46, thus holding themfrictionally against unintended movement. a

Two corresponding stampings 52 are positioned between the heads of thescrews 44 and 46. Each of the stampings comprises a cap having a flangeor skirt 53 adapted to slip over the head of the screw with asubstantial clearance and swedged in the top of the cap is asemispherical portion 54 adapted to seat in the recess 50 in the headsof the screws. The flanges 53 serve as a loose connection between theheads of the screws, forcing them to turn together in for the receptionof an adjusting wrench or tool by which the caps may be rotated. Thesemispherical portions 54 of the stampings 52 jointly form a ball orthrust member or pivot between the heads 48, and with respect to whichsaid heads can turn slightly, thereby forming a pivot connection betweenthe shoes.

The heads 48 on the screws and the skirt of the caps 52 are polygonal;hence movement of one affects the other, and the caps 52 are retained inposition on the screw heads 48 by a coil spring connecting the ends ofthe shoes.

Although this invention has been described in connection with certainspecific embodiments, the principles involved are susceptible ofnumerous other applications that will readily occur to persons skilledin the art. The invention is, therefore, to be limited only as indicatedby the scope of the appended claims. The present application is juniorin date of invention to application No. 499,683, filed December 3, 1930.

Having thus described the various features of the invention, what Iclaim as new and desire to secure by Letters Patent is:

1. An adjusting device comprising right and left threaded screws and arounded member between the screws and forming a pivotal thrustconnection therebetween.

2. An adjusting device comprising right and left threaded screws, headson the screws having sockets, means in the sockets providing a pivotalconnection between the screws.

3. An adjusting device comprising right and left threaded screws, headson the screws having registering sockets and means sleeved on the headsof the screws providing pivotal connection between the screws.

4. An adjusting device comprising right and left threaded screws,enlarged heads on the screws having registering sockets, and meansengaging the periphery of the heads of the screws and having a pivotportion seated in the sockets.

5. An adjusting device comprising right and left threaded screws,enlarged heads on the screws having registering sockets, cap membersarranged top to top having registering swedged portions providing aspherical member seated in the registering sockets and means forsecuring the cap members together.

6. A brake comprising friction elements, right and left threaded screwsengaging the elements, enlarged heads on the screws having semisphericalrecesses, and a part having spherical portions seated in the recesses,and having means for being retained against displacement angularlywithout preventing it from moving with the friction elements in thedirection of their length.

7. A brake comprising a shoe having a web with a slot extending entirelytherethrough, and teeth on the walls defining the slot.

8. A brake comprising a shoe having a slot, teeth extending into theslot and semi-cylindrical members straddling the slot.

9. A brake comprising a shoe having a longitudinal slot, teeth on thewalls defining the slot and registering semi-cylindrical members on theshoe straddling theslot and teeth.

10. A brake comprising shoes having webs having slots extendingtherethrough, teeth on the webs extending into the slots, screwspositioned in the slots having threads engaging the teeth on the webs,and pivotal means connecting the screws. I

11. A brake comprising a shoe including a web having a longitudinalslot, teeth on the web extending into the slot, reinforcing plates onthesides of the web, semi-cylindrical portions on the reinforcing platesstraddling the slot and the teeth and providing a'cylinder, an adjustingscrew positioned for travel in the cylinder having threads thereonengaging the teeth on the web.

12. A brake comprising shoes having webs provided with slots, teeth onthe webs extending into the slots, reinforcing plates on the webs havingregistering semi-cylindrical portions straddling the slots and theteeth, right and left threaded screws retained in the slots by thesemi-cylindrical portions with the threads on the screws engaging theteeth and means pivotally connecting the screws, including memberssleeved on the heads of the screws and provided with pivot means adaptedto engage the heads of the screws.

13. A brake shoe comprising a stiffening web formed with teeth cutentirely therethrough, a thrust member having a stem in adjustablethreaded engagement with the teeth and means for holding the thrustmember in engagement with the teeth.

14. A brake shoe comprising a stiffening web formed with teeth cutentirely therethrough, a thrust member having a stem in adjustablethreaded engagement with the teeth and parts secured to opposite sidesof the web supporting the thrust member.

15. A brake comprising a pair of shoes having at their adjacent endsadjustable thrust members and a member having spherical portionsconfined between and free to float with the thrust members serving as apivot between the shoes.

16. A brake shoe having a stiffening. web formed with teeth out thereinand having means to hold in place an adjusting member threaded into saidteeth. I

17. A brake shoe having a stiffening web with a slot formed on its edgeswith teeth out in said web and having means to hold in place anadjusting member engaging said teeth.

18. A brake shoe having a web with a slot extending into its end, andhaving parts secured to its sides and defining, between them and withsaid slot, a socket extending into the end of the shoe.

19. A brake shoe having a web with a slot extending into its end, andhaving semi-cylindrical registering parts secured to its sides inregistry with said slot and defining, between them and with said slot, agenerally-cylindrical socket extending into the end of the shoe.

20. A brake shoe having a web with a slot extending into its end, andhaving parts secured to its sides and defining, between than and withsaid slot, 9, socket extending into the end of the shoe, said shoehaving means in said socket for adjustably engaging a thrust memberreceived therein.

21. A brake shoe having an adjusting member threaded therein and havingmeans under fixed tension frictionally engaging said member and holdingit from turning.

22. A brake shoe having an adjusting member threaded therein and havingparts secured to its sides and embracing said member between them andfrictionally gripping said member and yieldingly holding it fromturning.

23. A brake shoe having a, thrust member adjustably mounted therein, andhaving a web provided with separately-formed parts secured thereto atopposite sides embracing said member between them, and means for holdingsaid parts in engagement with the opposite sides of said member.

24. A brake adjustment comprising a pair of plates having registeringlongitudinally extending depressions forming a cylindrical aperturebetween said plates.

25. A brake comprising a shoe having a web having a slot in its end andprovided with stampings secured to its sides and located at the end ofthe shoe to provide a socket in said end.

26. A brake comprising a shoe having a web having a slot in its end andprovided with stampings arranged on opposite sides of the web and formedwith registering depressions forming a generally-cylindrical socket.

27. A brake comprising a shoe having a web having a slot in its end andprovided with stampings secured to its sides and formed with registeringdepressions jointly defining a socket between them.

28. A built-up stamped steel brake shoe having a web and having at theend of the web means including stampings securd to the web and formedwith registering grooves and which means forms a cylindrical socket inits end formed by two stampings having registering semi-cylindricalgrooves.

29. A brake comprising a shoe and an adjusting member therefor, theadjusting member including a screw, and the shoe comprising a web formedto receive said screw so arranged that the axis of the screw lies withinthe plane of the web, and a stamping formed with a depression andsecured to one side of the web for maintaining the screw in saidposition.

30. A brake comprising a shoe and an adjusting member therefor, theadjusting member including a screw, and the shoe comprising a web formedto receive said screw, and means including a stamping formed with adepression and secured to one side of the web for maintaining the screwin said position.

' VINCENT BENDIX.

